19. Is Dark Matter the Cause of Space’s Expansion?
For countless years, the universe’s expansion has been decelerated. More recently, about 1 million years ago that is, the universe’s expansion has started to speed up, and at a rapid rate.
Einstein has said that he believes this dark matter isn’t empty, but instead full of particles that form then quickly disappear, which makes it hard to study and determine more about.
Dark matter has a different effect than typical energy has on the universe, which causes some to believe that this is a new type of gravity. What dark matter is ultimately doing is pushing objects in space away from each other, which results in an unneeded expansion of the universe.